CN1087706C - Method and system of sensing output level of output stack of print media in image forming apparatus - Google Patents

Method and system of sensing output level of output stack of print media in image forming apparatus Download PDF

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Publication number
CN1087706C
CN1087706C CN98107978A CN98107978A CN1087706C CN 1087706 C CN1087706 C CN 1087706C CN 98107978 A CN98107978 A CN 98107978A CN 98107978 A CN98107978 A CN 98107978A CN 1087706 C CN1087706 C CN 1087706C
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output
print media
lamination
height
physical property
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Expired - Fee Related
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CN98107978A
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CN1199013A (en
Inventor
托马斯·威尔伯·布兰克
赛勒斯·布拉德福德·克拉克
马修·洛厄尔·麦基
菲利普·拜伦·怀特
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Lexmark International Inc
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Lexmark International Inc
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H43/00—Use of control, checking, or safety devices, e.g. automatic devices comprising an element for sensing a variable
    • B65H43/06—Use of control, checking, or safety devices, e.g. automatic devices comprising an element for sensing a variable detecting, or responding to, completion of pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/15—Height, e.g. of stack
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/30—Numbers, e.g. of windings or rotations

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  • Controlling Sheets Or Webs (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Handling Of Cut Paper (AREA)

Abstract

A method of determining an output level of an output stack of print media in an image forming apparatus. The print media is transported, one print medium at a time, to the output stack. A sensor positioned in association with the output stack senses when the output level of the output stack has reached a near full level. At least one physical characteristic of the print media is identified which can affect the stacking of the print media. The number of the print media transported to the output stack is counted after the near full level is sensed. A determination that the output level of the output stack has reached a full level is made, dependent upon each of the at least one physical characteristic and the counted number of the print media.

Description

Detect the method and apparatus of the height of print media output lamination in the image device
Technical field
The present invention relates to image device, specifically, relate to the nearly method that expires state in a kind of definite printer output storage box.
Technical background
The image device of electrophotographic printer and so on generally comprises at least one input cartridge and at least one output storage box.The print media of particular medium type, for example common paper, a letter paper, card, envelope, label, tracing film, preprinted form, bill and/or chromatics paper are transported to selected output storage box from selected input cartridge by image device.General print media is put into the output storage box from the position near output storage box top.For most of print jobs, the degree of depth of output storage box is guaranteed enough that the output lamination of print media can not stop up and is put the paper mouth near the output storage box top.But for king-sized print job, the increase of output laminated thickness causes the most at last exporting and highly hinders putting into of following printing, thereby causes the chopping machine paperboard.In addition, more and more at large the multiple-user network of chopping machine and local area network and so on is connected, can send a plurality of print jobs within a short period of time to chopping machine in multiple-user network.Unless check chopping machine continuously, otherwise that a plurality of print jobs of printer prints also can cause exporting the height of lamination is too high, thereby also can causes paperboard.
A kind of known method is that the place near the output storage box disposes two sensors in image device.This sensor generally is an optical pickocff, but also can use the mechanical pick-up device with throw of lever.When the output of output lamination in the output storage box was lower than the peak output height of output storage box highly slightly, one of sensor was started.In case started this sensor, chopping machine will indicate the output of output lamination in the output storage box highly near the peak output height to the user.This indication can be the acoustical signal indication of vision indication on the display panel or chimes of doom and so on.If from the output storage box, do not take out the output lamination, and the output of output lamination highly continues to increase in the output storage box, then when the height of output lamination reaches output storage box peak output height, be configured near second sensor of output storage box and started.Subsequently chopping machine to the user indicate the height of output lamination reached the peak output height also/or the operation of time-out printing machine, take out the output lamination up to the user.
Adopt the method for two standalone sensors to be suitable for indicating the difference in the chopping machine to export height as mentioned above, and be suitable for preventing causing paperboard because of output highly reaches maximum height to the user.But, need to adopt two standalone sensors to increase the complexity and the cost of chopping machine.In addition, the microprocessor in the chopping machine need have respectively and these two sensor bonded assembly independence input ends, so that from these two sensor received signals.The increase of fan-in purpose also can increase the complexity and the cost of chopping machine on the microprocessor.
Known another kind of method adopts single-sensor in chopping machine, this sensor configuration and detects the near full height of output lamination in the output storage box near the output storage box.When this single-sensor was started, the output that the user can obtain exporting lamination had highly reached the indication of nearly full height.This method is not to adopt another sensor to detect the full height of exporting lamination, but configure microprocessor so that after detecting the nearly completely height of output lamination, is exported the print media of predetermined number of pages to the output storage box.Predetermined number is general according to being determined by the mean thickness of the media type of printer prints usually.For example, most of print jobs need be used 20 pounds of quantitative common paper.The mean thickness of this common paper is about 0.004 inch.If the maximum of output storage box completely highly is about 500 pages, then sensor can be configured in the position that highly is about 450 pages of print media corresponding to the output of output lamination, and predetermined number can be set at 50, thereby after the nearly completely height sensor of starting, after 50 pages of print media of output storage box output, the output of output lamination highly reaches full height.
If the media type of print media is consistent with common paper, it is working properly then to adopt single-sensor to detect the chopping machine of nearly full height of output lamination as mentioned above.But because the difference of the physical property relevant with media type, the situation of piling up of the medium of other type has nothing in common with each other in the output lamination in the output storage box.For example, owing to be folded, so the thickness of envelope is greater than the thickness of common paper.So compare with common paper, detect near expiring after the height, the envelope quantity that is transported in the output storage box can not be identical with the quantity of common paper.On the other hand, the quantitative and thickness of other type common paper can be less than the quantitative and thickness of 20 pounds of paper.So for thin paper, just may be to the more paper of output storage box delivery ratio predetermined number.If predetermined number is based on 20 pounds of paper, then recognize when reaching full height when pushing away, in fact export storage box and but be underutilized.In addition, some media type can curl be transported to the output storage box by chopping machine after.This print media may be around the axis of symmetry that stretches along the print media page or leaf longitudinal axis, and perhaps the axis of symmetry perpendicular to the print media page or leaf longitudinal axis curls.The curling tendency of print media causes exporting the actual (real) thickness of " effectively " height of single page print media in the storage box greater than the single page print media.The print job that use has the tendency print media that curls will make the theoretical output height of effective output height of output lamination greater than the output page ulking thickness.So carry the print media that curls and be inclined to that has of predetermined number of pages, will make effective output height of exporting lamination greater than full height, thereby may cause the chopping machine paperboard.
Fig. 1 graphic representation with the output lamination of the print media that curls about the axis of symmetry of the print media page or leaf longitudinal axis.Effective output of output lamination highly is the function of factor that curls, and the factor that curls is by the effective thickness (D that piles up page or leaf CURL) divided by the theoretic throat (D that piles up the print media page or leaf VIRGIN) quotient representation.
Now this area is required is a kind ofly not need a plurality of sensors that are used for determining nearly full and full output height, and can predict the image device of the full height that when reaches the output storage box more accurately.
Summary of the invention
The invention provides a kind of the near full method and system that highly reach full height that adopt a sensor to determine print media output lamination, wherein regulate detecting the nearly number that height flows to the print media of output lamination afterwards of expiring according to one or more physical features of print media.
A kind of form of the present invention comprises the method for the output height of print media output lamination in a kind of definite image device.Print media is transported to the output lamination by each paper.Its position location highly reaches nearly full height with the output when relevant sensor of output lamination exports lamination.At least one physical property of identification print media.Count detection is transported to the number of the print media of output lamination after nearly completely height.According to the count value of described at least one physical property and print media each, judge that the output of output lamination has reached full height highly.
An advantage of the invention is and do not use second sensor, more accurately near the full height of exporting lamination.
Another advantage of the present invention is the possibility of height paperboard during for full height that can reduce to export lamination.
To more clearly understand above-mentioned and other feature and advantage of the present invention with reference to following explanation and accompanying drawing to one embodiment of the invention, and the mode that obtains these features and advantage, and will understand the present invention better.
Description of drawings
Fig. 1 graphic representation the output lamination of the print media that curls;
Fig. 2 is the scheme drawing of explanation and main frame bonded assembly electrophotographic printer;
Fig. 3 has represented the electronic unit of electrophotographic printer shown in Figure 2 in detail, and the near of output lamination expired and full output height in the output storage box;
Fig. 4 is the diagram of circuit of an example of the method for explanation the present invention output height of being used for determining chopping machine print media output lamination.
The specific embodiment
In several figure, the parts that identical symbolic representation is identical.Example in this explanation has illustrated a most preferred embodiment of the present invention, but this example should not be construed to limit the scope of the present invention.
With reference now to accompanying drawing,, specifically referring to figs. 2 and 3, represented a embodiment among the figure with main frame 12 bonded assembly image devices 10.In the embodiment shown, image device 10 is an electrophotographic printer.But image device 10 also can be the miscellaneous equipment except that electrophotographic printer, for example electrofax copying apparatus or ink jet printer.Chopping machine 10 is connected with main frame 12 by multi core cable 14, and from main frame 12 reception information or to main frame 12 transmission information.
Chopping machine 10 comprises the input cartridge 16 of the input lamination 18 of a print media that holds the selected media type.Print media can be common paper, a letter paper, card, envelope, label, tracing film, preprinted form, bill or colored medium.Particular medium in the input cartridge 16 is generally imported by the application software of main frame 12 execution or from operator's panel (not expressing the figure) by the user.By the every kind medium of user by main frame 12 or the input of operator's panel (not shown), chopping machine 10 can comprise additional input cartridge (not expressing among the figure) for just.
Chopping machine 10 also comprises a sheet transfer system that the each ground of print media is transported to output lamination 20 in the output storage box 22.Sheet transfer system has been determined a paper transport path that passes through chopping machine 10 by dotted line 24 expressions.Sheet transfer system comprises and a plurality ofly is involved in each independent print media by friction, and carries the roller bearing of print media along paper transport path 24.In order to illustrate, represented the roller bearing 26 of and coact relative among Fig. 2 along two couple in a plurality of roller bearings of paper transport path 24.Roller bearing rotates along the opposite direction shown in the figure 26, thereby each independent print media 28 is moved along preposition direction 30.
The operation of the electric treatment circuit 32 control chopping machines 10 of microprocessor and so on.The input media 34 of keypad that electric treatment circuit 32 is operated by lead 36 and user and so on is connected, and from these input media 34 reception information (Fig. 3).Input media 34 can be various operations, and for example diagnositc test, set etc. is to electric treatment circuit 32 output signals.In addition, input media 34 can be used to input and is placed on each input cartridge, for example the particular medium type in the input cartridge 16 in the chopping machine 10.
Electric treatment circuit 32 also by corresponding lead 42 and 44 from leading edge sensor 38 and output height sensor 40 receiving inputted signals.Leading edge sensor 38 can be arranged on any suitable position along paper transport path 24, in order to detect a leading edge of every print media 28.For example, leading edge sensor 38 can be arranged in the input side of photoelectricity magnetic drum (not expressing among the figure), and the leading edge that makes each print media is with respect to the timing of the latent image area on the photoelectricity magnetic drum.
The position location of output height sensor 40 is relevant with output lamination 20.Specifically, the layout of output height sensor 40 is relevant with output lamination 20, when highly reaching nearly full (NF) height with the output of box lunch output lamination 20, provides a signal to electric treatment circuit 32.When each print media is fallen output lamination 20 tops, during by nearly full height, can not send a signal to electric treatment circuit 32 unintentionally for single print media moment, be essential from the suitable adjustment of the signal of output height sensor 40 outputs.If do not receive any signal from output height sensor 40, then electric treatment circuit 32 judges that the output of output lamination 20 highly is lower than nearly full height.If receive signal from output height sensor 40, then electric treatment circuit 32 judges that the output of output lamination 20 highly is equal to or higher than nearly full height.Highly equal nearly full height if judge the output of output lamination 20, then electric treatment circuit 32, is used to point out the user to export and reaches nearly full height highly to appropriate signal of indicating device 48 outputs by lead 46.Indicating device 48 can be, for example the display panel and/or the audible alarm of chopping machine 10 front ends.
Illustrate that below with reference to Fig. 4 the present invention is used for judging the embodiment of method of the output height of chopping machine 10 print media output lamination 20.
In the beginning (frame 50) of print job, chopping machine 10 receives print data by multi core cable 14 from main frame 12.Chopping machine 10 sequentially is transported to print media 28 each ground the output lamination 20 (frame 52) in the output storage box 22.Print media sequentially is transported to and is placed in the output storage box 22, highly reaches nearly full height up to the output of output lamination 20, sensor 40 during by starting till.Sensor 40 provides appropriate signals to electric treatment circuit 32, electric treatment circuit 32 sends an output signal by lead 46 to indicating device 48 more then, so that provide an indication output to reach the vision or the acoustical signal indication (frame 56) of nearly full height highly to the user.Detect near expiring after the height, continue immediately the print media sequentially-fed in output storage box 22.
Detect near expiring after the height, the present invention only carries the print media of predetermined number of pages to output storage box 22, but utilizes some intrinsic physical property of media type is that the print media that is transported in the output storage box 22 estimates when arrive full height more accurately.Usually, utilize software or input media 34 in the main frame 12 to dispose the particular medium type that is placed on selected input cartridge 16 and exports from selected input cartridge 16.Every kind of media type all has exclusive physical property, and this physical property influence detects near expiring after the height, and various print media are transported to the number of pages in the output storage box 22.For example, the print media of certain particular medium type has mean thickness, the coefficient that curls, quantitatively and/or physical property such as texture, and these physical propertys influences detect the nearly number of pages that is transported to the print media in the output storage box 22 after the height that expires.Chopping machine 10 reaches the data corresponding to the particular medium type of using in the print job from the print data of main frame 12 reception operations specific, the physical property (frame 58) of medium number of pages this data identification media type, that influence is piled up in output storage box 22.On the other hand, also can carry out frame 58 afterwards detecting next print media (frame 62).This information also can be by input media 34 inputs.
Detect near expiring after the height, the expectation target number of pages that print media should be transported in the output storage box 22 generally is set to the most frequently used media type, for example quantitatively is that 20 pounds common paper should be transported to the number of pages of exporting in the storage box 22 (frame 60).For example, be about 500 pages output storage box and be arranged in respect to the output height sensors of about 450 pages of outputs on the height and positions for maximum capacity, expected value is set to 50.Representative detects the nearly variable COUNT that is transported to the adjustment number of pages of the print media in the output storage box 22 after the height that expires and is set to 0.Certainly, because input capacity of storage box and sensor be with respect to the location aware of input storage box, so the actual execution time of step shown in the frame 60 also can be arranged in shown in Fig. 4 before the time.
When print media, is utilized sensor 38 to detect next print media page or leaf, and transmits appropriate output signals (frame 62) to electric treatment circuit 32 in output storage box 22 time by sequentially-fed constantly.At frame 64, set a proportion factor, this proportion factor depends at least one physical property of print media page or leaf.Following table has been enumerated the proportion factor of various media types and corresponding separately physical property: original thickness, normalization thickness and lamination factor.
The printer paper type Original thickness Normalization thickness Lamination factor Proportion factor
Common paper (20 pounds) .004 1 1 1
Tracing film .007 1.75 1 2
Label .010 2 1.5 3
Envelope .020 4 3 50 (maximum 500 pages)
25 (maximum 250 pages)
Card .095 2.25 1.5 3
Original thickness is the mean thickness of every kind of media type.Normalization thickness is the slight correction of the thickness ratio of particular medium type and 20 pounds of quantitative common paper.The normalization thickness of 20 pounds of common paper is set to 1.Lamination factor is relevant with the ability of comprehensively piling up of particular medium type in the printer output storage box.For example, envelope has hinged joint and can influence the envelope tongue that envelope piles up ability.In addition, the curling factor of particular medium type also can influence the pile up ability of this kind medium in the printer output storage box.As mentioned above, the curling height (D of curling factor representative output lamination CURL) divided by the original thickness (D that exports lamination VIRGIN) ratio that obtains.The lamination factor that does not comprise the media type of hinged joint or envelope tongue equals the factor that curls.Proportion factor is similar to the max-int that the product with normalization thickness and lamination factor rounds up and obtains.But the proportion factor of envelope but is adjusted to quite high.That is, envelope is because " narrow " (scattering in the time of can causing envelope to pile up) and have in fact and can separate with envelope, and influence the envelope tongue that following printing is piled up in the output storage box, so in general, envelope is not the good medium of stackability.So,, the proportion factor of envelope is set at the numerical value that only allows to stack two envelopes between nearly full height and full height, as above shown in the table although the proportion factor of envelope should equal 12 (normalization thickness multiply by curling factor).
At frame 66, the value of the variable COUNT proportion factor value that upper ledge 64 is set that adds up.Like this, if for example COUNT equals 0 (just having detected nearly full height) and next print media is a tracing film, then variable COUNT equals 0+ (1*2)=2.
At decision box 68, whether the value of judgment variable COUNT is greater than the number of targets of setting in the frame 60.If the accumulated value of variable COUNT is not more than number of targets, then control rotates back into frame 62, and detects next print media.Otherwise, if the value of variable COUNT is greater than number of targets (for example, capacity is that the number of targets of 250 pages output storage box is 25, and capacity is that the number of targets of 500 pages output storage box is 50), then judge to have reached full height, and provide a vision and/or acoustical signal indication (frame 70) to the user.
In shown in Figure 4 and aforesaid embodiment, proportion factor is multiplied by integer 1, and integer 1 is represented the single print media in the print media output lamination.By height is transported to each print media preset proportion factor of exporting in the storage box 22 afterwards in order to detect closely completely, and subsequently proportion factor be multiply by integer 1, then can change the media type that is transported to the print media in the output storage box 22.On the other hand, the media type that is transported to the medium of output in the storage box 22 preferably all is same type, and does not change, and each like this when detecting next print media, only the value with variable COUNT adds 1.Whether multiply by the product of proportion factor more than or equal to the number of targets of in frame 60, setting so just can judge COUNT.
In reaching embodiment shown in the drawings as mentioned above, the meeting of print media influence can be transported to one or more physical propertys of the print media number in the output storage box 22 and be imported by main frame 12 or input media 34 by the user.But, also can in chopping machine 10, dispose suitable sensor and detect the physical property that is used for the proportion factor setting, for example dielectric thickness, transparent medium etc.
Though with reference to most preferred embodiment the present invention has been described, under the situation of the spirit and scope of following claim defined, this area has the experience personnel can make various changes in form and details.

Claims (12)

1. the method for the output height of print media output lamination in the definite image device, described method comprises the steps:
The each one page of multiple print media is transported to the output lamination;
A position location and the relevant sensor of output lamination are provided;
The output that utilizes described sensor when to export lamination highly reaches nearly full height;
At least one physical property of identification print media, described at least one physical property can influence piling up of this print media;
Count detection is transported to the print media number of output lamination after nearly completely height; And
According to described at least one physical property and the described print media number that counts to get each, judge that highly when the output of output lamination reach full height.
2. the method for claim 1, wherein said print media can influence at least one physical property that print media piles up and comprise at least one following characteristic:
The mean thickness of each print media;
The curling factor of each print media;
The weight of each print media; And
The texture of each print media.
3. method as claimed in claim 2, wherein said at least one physical property depends on the media type of each print media, and described media type is one of common paper, a letter paper, card, envelope, label, tracing film, preprinted form, bill and chromatics paper.
4. method as claimed in claim 3, wherein each described print media is identical described media type.
5. method as claimed in claim 2 also comprises the steps:
Determine to depend on the proportion factor of described at least one physical property;
Described count value and described proportion factor addition with print media.
6. method as claimed in claim 5 also comprises and sets a number of targets corresponding to the number of pages of the print media that will be transported to the output lamination after detecting described nearly completely height; And wherein said determining step comprises that the output that is judged to be the output lamination when count value that obtains when described addition is more than or equal to described target data highly reaches described full height.
7. the method for claim 1, wherein said image device comprises a chopping machine.
8. method as claimed in claim 7, wherein said chopping machine comprises electrophotographic printer.
9. the method for claim 1, wherein said sensor comprises optical pickocff.
10. the method for claim 1, wherein said image device comprise an output storage box, wherein export lamination and are placed in the described output storage box.
11. the equipment of the output height of print media output lamination in the definite image device, described equipment comprises:
The each one page of print media is transported to the device of output lamination;
Be used to detect the sensor that the output of when exporting lamination highly reaches nearly full height;
The device of at least one physical property of identification print media, described at least one physical property can influence piling up of this print media;
Count detection is transported to the device of the print media number of output lamination after nearly completely height; And
According to described at least one physical property and the described print media number that counts to get each, judge that highly when the output of output lamination reach the device of full height.
12. equipment as claimed in claim 11, wherein image device comprises a chopping machine, and wherein said feedway comprises a paper delivery system.
CN98107978A 1997-05-09 1998-05-08 Method and system of sensing output level of output stack of print media in image forming apparatus Expired - Fee Related CN1087706C (en)

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US853681 1977-11-21
US853,681 1997-05-09
US08/853,681 US5961115A (en) 1997-05-09 1997-05-09 Method and system of sensing an output level of an output stack of print media in an image forming apparatus

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CN1087706C true CN1087706C (en) 2002-07-17

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JPH10334210A (en) 1998-12-18
EP0876983B1 (en) 2003-09-10
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CN1199013A (en) 1998-11-18
DE69817912D1 (en) 2003-10-16
KR100567676B1 (en) 2006-06-16
US5961115A (en) 1999-10-05
EP0876983A1 (en) 1998-11-11
TW497548U (en) 2002-08-01
KR19980086757A (en) 1998-12-05

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